Carbureter.



R. WQHARROUIII.

CARBURETER.

APPLICATION FILED AuG.8. 1912.

L T ,m QU IM Mm AE du .me a P "I I. MII II R. W. HARROUN. CARBURETER.

APPLICATION FILED AUG.8. 1912.

Patented Apr. I3, 1915.

2 SHEETS-SHEET 2.

III

RAY HARROUN, OIF NlDI-ANAJPOLES, NIDANA, ASSIGNOR, BY MESNE ASSIGNMENTS, T INVINCIJBLE MANUFACTURJING COMPANY, CORPOTION 0F PENNSYLVANIA.

CARBURETER.

tisanes.,

To alljwh'om it may concern:

Be it known that l, RAY W. HARRQUN, a citizen of the United States, residing at lndianapolis, in the county of Marion and Vcarbureters and has for its general object to provide a carbureter construction which shall be capable of novel automatic response -d to keep the richness yof the mixture at all vide times satisfactory to the needs of the engine supplied.

Another object of my invention is to provide a casing structure so arranged that the carbureter shall be sufficiently warmed and condensation practically eliminated by an advantageous collocation of the mixing chamber, the fuel chamber, and the associated passageways, so that the carbureter shall 'be warmed, as on cold days, more quickly after beginning of operation of the device than would be the case if the device were water-jacketed. l

Another object of my invention is to proan advantageous nozzleoperating means such that the richness of the mixture, as upon quick opening of the throttle, will be automatically increased above that which prevails in the normal running of the device,

' so that the parts need not be adjusted to supply-,a richer mixture-than necessary under normal running conditions in order that the mix-ture shall be rich enough upon the occasions requiring a charge of unusual rich-` ness, and to this end my invention contemplates provision of a novel valve for an auxiliary air inlet to the mixing chamber and novel connect1ons between such valve and the valve for the carburetlng nozzle.

Other objects of my invention, structural and functional, will become apparent from aconsideration of the following description taken in conjunction with the drawings, whereinf'- l Figure 1 is a vertical centralsection through a carbureter constructed in accordance withmyinvention; `llig. 2 is a section on line 2,-2 oflFig. 1; lFig. 3l isa section on line 3.-?) of Fig. 1; and lFig. t is a section on line A-f'of `llfig. 1.

1n the drawings, A indicates in general a casing membery in the interior of which s` provided a mixing chamber 5 open to the specification of Letters ratent. Application led August 8, 1912. Serial Non. 71A,065.

Patented apr.' ia, man.,

outlet 6, the chamber being bounded in part by top wall 7 and partition wall 7 to provide within the casing A a passage 9 constituting an auxiliary. air-supply passage for valve-controlled communication with chamber 5 through a port 8, and constant `of a suitable guide and supporting member 15 for association with the valve and retard means to be hereafter described.

ln the bottom of the casing A, preferably under the outlet 6, lf provide a tubular extension 16, constituting the carbureting tube or chamber leading to the mixing chamber, the interior of which is suitably restricted as at 17 for coaction with a suitable nozzle 'to be described.` At the end of extension 16 is a cross member 16, preferably integral therewith, which is transversely bored as at 18 andvvertically bored'and screw threaded both above and below the transverse bore as at 19 and 20, to receive respectively the nozzle and drain cock to be described.

A second casin member B is adapted to coact with the casing member A, around the tubular member 16, to provide a fluid containing chamber. lFor such coaction with the casing member A the upper edge of the casing member B is shaped for close Contact with the lower wall of casing member A as at 21, and is provided with an interior wall 22 extending inwardly from the side wall of the casing member B, slightly above the bottom wall thereof, for coaction with the lower edge ofthe tubular member 16, said `parts being suitably shaped to receive a joint packing member 23 so that the space 24C above said horizontal wall, constituting thefuel chamber, is suitably separated from the space 25 thereunder which communicates through the carbureting tube 16 with the mixing chamber 5. Extending upwardly from the space 25 the casingB provides an air duct 26 communicating through perforations 27 in ldd assembled position.

the base of casing member A with they inlet 10, and constituting primary inlets leading s sition of coaction with casing A. .shown in Fig. 1, l preferably provide a pet cock 28- having a pipe 29 extending through a perforation 30 in the bottom Y wall of the casing member B, said pipe 29 being screw threaded at its end 4for engagement in the screw threaded bore 20 of the cross piece 16", the pet cock thus being in` a suitable position to drain the liquid fuel from chamber 24 and at the same time providing a simple and convenient means for maintaining the parts in Engaging inthe screw-threaded bore 19, l provide a suitable nozzle 31 having a valve seat 32, lateral perforations 33 thereabove, and a'guide portion 34 to receive the needle valve 35 which is held toward closed position by spring 36 at one end secured in lugr 37 on the interior of the wall 7', and at its other end engaging in a slot`38 in the end of the valve needle 35. v

It will be understood that the general casing arrangement described provides for advantageous retention of heat from the air passing therethrough by correlation of the mixing chamber, the fuel chamber, and the various air inlets and the outlet, so that such various divisions of the device have walls in common. By connecting the inlet 10 through a pipe C with'a jacketJ surrounding the engine exhaust pipe P, the air introduced into the carbureter maybe adequately heated, and since the exhaust pipegets hot" almost as soon as the engine starts running, the. heated condition of the air is secured verypromptly after the engine starts.

Within the fuel chanber 24, ll provide the g usual float 39 for operation of the valve 40 to control the height of fluid in the chamber 2 4, any suitable connections' between the float'39 and valve 40 being provided asv for instance a ivoted lever 41 to "one arm of which the goat is secured as at 42 and the other arm of-whichfcarries the stem 43 of .the valve 40, the connections between the fet lever 41 and the stem-43 being of some suitable nature, asshown at44, to accommodate the inclinations ofthe lever incident to voperation of the lfloat 39. As `a further feature of the usual carbureter construction a f throttle valve'45 isshown in the exhaust outlet for operation in usual fashion.

The valve construction for the auxiliary air 'inlet port 8 is such as to cause an initial movement of the fluid-controlling Vneedle valve 35 before theauxiliary inlet port 8 is opened, so that upon sudden opening of the throttle, 45, the resultant increasein suction may open the gasolene `salve to enrich the mixture before port 8 ,is opened. 1To this and other ends l provide a valve' 46 vprovided with openings between its arms 46 and secured as by pin 47 to stem 47 which has two diameters separated by shoulder 48 for purposes described hereafter, and upon said valve 46 I mount a diaphragm 49, of leather or other suitable material, secured near its edges, as at 50, to the underside of the valve so that the central portion of said diaphragm is movable before the valve is moved to open port 8, said diaphragm being of course perforated as at 51 for passage therethrough of the stem 47. IThe perforation 51 is preferably larger in diameter than the reduced portion of the stem 47 to accomy modate a sleeve member 52 loose on the reduced portion of the stem 47 for free movementbetween the shoulder 48 and the frame 46. The sleeve 52 provides a iange i 53, preferably midway thereof, and between said flange 53 and a flange 54 of sleeve 55, securely mounted upon sleeve 52, diaphragm 49 is engaged. It will thus be apparent that the vertically movable part composed of sleeves 52 and 53 is movable with the diaphragm, and that its downward movement relative to the valve proper is limited by shoulder 48 while .in normal position it abuts against the valve. The sleeve 55 is provided upon its lower edge with a flange 56 between which and the bottom closure 15 a compression spring 57, surrounding the stem 47 and stem guide 58, engages to hold the diaphragm-carried sleeve in uppermost position and through it to hold the valve in closed position. The flange` 56 is further extended asat59 for coaction with a means for connection of the auxiliary air valve 46, with the gasolene valve 35.

The connection betweenthe closure for the auxiliaryinlet described and the needle valve 35 preferably talles the form of walking beam 60 provided at a suitable point be- ,tween its ends with a deflected portion 61 .slot 64 being such as to accommodate variation in the inclination of the beam 60. The

changed and the movement ofl needle valve bile, the position of the pivot point of the beam may be varied with respect to the valves.

rllhe stem 47 extends through the closure member 15 within the guide 58, and at lits outer end carries a horizontal piston member 71 having a somewhatsmaller diameter than that of a cylinder structure 72 carried by the closure member 15 and adapted to contain a body of oil by means of which the movement of the piston member 71 and consequently the movement of the frame 46 through stem 47 and of the inlet-closing edges of the diaphragm 49 is uniformly retarded. When the diaphragm is depressed by reduction of pressure in the mixing chamber, obviously the Weight of the auxiliary valve together with pressure upon its upper side will cause the opening lof the valve subject, of course, to the retard means.

Theoperation of the device.. is as follows: The inlet 10, is preferably connected with the exhaust-pipe jacket or' other engineheated part, and thus the airlentering the carbureter is warmed. As soon as the pressure above the outlet 6 is reduced incident to the initial operation of the engine, throttle 45 being openedn air is drawn from inlet 10 through the perforations 27 and primary air bureting tube 16, imparting some ofits heat inlet 26 to the lower space 25 of the casing member B,and thence up within the carto all of these parts in its passage thereby to warm the gasolene and all of the walls on which the gasolene vapor-might condense. After passing through the restricted portion 17 of the carbureting tube the air receives fuel from the nozzle openings 33, the needle 35'having been properly raised by 'movement of beam 60. rlhis beam, may, of course, be hand-adjusted by operation of lever 69, and furthermore the suddenly-imposed lsuction in mixing chamber 5 causesl diaphragm 49 to be depressed thereby to Y rock the beam 60 'and further open the valve 35. During this initial operation auxiliary valve 46-closes the auxiliary air inlet port 8 as a result of the -retard device operating through stem 47, but the valve part 46 tends to follow the sleeve 52 downward on account of its weight and the pressure thereabove, as rapidly as the dash-pot resistance will per- 'mit. When starting it is preferable to opcrate the eccentric support 68 for the nozzle operatingl beam 60 so that the initial opening of the nozzle will result in a richer mixture than under normal operating conditions. VVhen the engine is runningproperly, the eccentric 62 is returned to normal height, and under these conditionsvthe heated air from inlet 10 enters casing A, a portion of such heated air passing, down through the primary inlet 26 and up through the carbureting tube, always lending some of its heat to the surrounding parts and being carbureted in its passage past the nozzle openings 33.l 1When the suction is sufficient to cause opening of the auxiliary valve 46 the remaining portion of the air from inlet 16, (surrounding the outlet 6 and mixing chamber 5, and therefore lending some of its heat to said parts) passes through the auxiliary air supply passage 9 and port 8 into mixing chamber 5 to join the carbu'reted air from the tube 16. In this operation, it will be obvious that the valve, its retard means, the connection between the beam 60 and the valve, and the beam, operated by the diaphragm 49, provide an arrangement where all variations incident to the use of the carbureter, such as sudden increase in suction and the like, are automatically taken.

care of by my device, without need to compromise the normal running condition in order to take ca-re of the less frequent occurrences of use, for it will be obvious that with the auxiliary air inlet 8 held closed (by retard) and the carbureting nozzle in tube 16 opened (by diaphragm) greater suction and consequently enhanced Carburation will result in said carbureting tube, and that the more sudden the variation in pressure the more marked will be this operationof the device, so that the deviceis both eflicient and economical. Advantages other than those which l have mentioned above will, of course,.be apparent to those skilled in the art from the above description of the device and its operation, and need not here be elabora-ted.

While l have herein described a single embodiment of my invention, it will be ap-` ,air inlet passing around the fuel chamber in contact'with the wall thereof to a space below said fuel chamber and a carbureting tube 'communicating between said space below the fuel chamber and said mixing chamber.

2. ln a 'carbureten the combination of a casing providing a mixing chamber, said casing havinga tubular member extending therefrom constituting a carbureting tube leading to the mixing chamber, a second casing member providing with said first casing a fuel chamber surrounding said tubular extension, a nozzle, means at the end of said tubular member for supporting the Inozzle therein having communication with the fuel chamber, means on said tubular member for engaging a part carried by a pet cock, and a pet cock "provided with a part engaged by said means on the tubular member in communication with the nozzle and fuel chamber, said pet cock providing a part for abutmentv against said second casing to retain it and the first mentioned casing assembled.

3. In a carbureter, the combination of a casing providing a mixing chamber and a fuel chamber, said mixing chamber provided with a carbureting tube and an auxiliary airV inlet, a nozzle in' the carbureting tube, a valve fory the nozzle, a valve for the auxiliary inlet, and means for operation of the nozzle valve by the auxiliary valve comprising lost-motion connections therebetween, and a pressure-responsive part for movement of said lost-motion connections before movement of the auxiliary valve.

4. ln a carbureter, the casing providing a mixing chamber having a carbureting tubeand an auxiliary air inlet, carbureting ymeans in the tube, a valve for the auxiliary inlet, connections between said carbureting means and valve, and retard means for-said valve, said connections including a movable part having lost-motion connection with said valve, and a pressure-responsive part, operable independently vof said retard means, for moving said connections.

5. ln a carbureter, a casing providing a mixing chamber having a .carbureting tube and an auxiliary air inlet, carbureting means in the carbureting tube, a closure for said auxiliary inlet including a diaphragm, a diaphragm-carried part, and a valve, connections between said diaphragm-carried part and said carbureting means, means for i holding said inlet valve closed controlled by the diaphragm, and retard means Aforksaid valve. f'

` 6. ln a carbureter, a casing'providing a kmixing chamber having a carbureting tube and an auxiliary air inlet, carbureting means in the-carbureting tube, a valve for said auxiliary inlet including ya frame, and a diaphragm secured thereto near .its edges, a

stem carried by said frame, and a diaphragm-carried part loose on said stem, a re tard means associated with said stem, and operating connections between said diaphragm-carried part and said carbureting means.

7. In a carbureter, a casing providing top and bottom walls and an intermediate wall dividing the mixing chamber from an air chamber, carbureting means for said mixing chamber, said three walls having alining openings therein, a valve for the opening in the top wall, a closure for the opening in the bottom wall, retard means carried by said latter closure, a stein between said valve and retard means, and means on the stem for operation of the carbureting means in accordance with movements of the valve.

8. In a carbureter, a casing providing a mixing chamber having outlet and fuel inlet openings, and an auxiliary air inlet, a pressure-responsive valve therefor, a nozzle in the fuel inlet, and pressure-responsive means to yoperate said nozzle, said pressure responsive means interconnected with the air valve and adapted `and arranged to respond to pressure-more quickly than said valve for the auxiliary air inlet. y

9. ln a carbureter, the combination of a casing providing a mixing chamber having a carbureting tube and an auxiliary airinlet, a nozzle valve in the carbureting tube, air pressure-responsive means for operating said nozzle valve, and retarded air pressureresponsive means interconnected with the nozzle valve to control said auxiliary air inlet.

l0. In a carbureter, a casing providing a mixing chamber and a fuel chamber, said.

casing being shaped rto provide a primary air inlet passing around the fuel chamber in contact with the walls thereof to a space below said fuel chamber, and a carbureting tube passing concentrically through the fuel chamber and communicating at its lower end with the space below the fuel chamber and at its upper end with the mixing chamber.

in testimony whereof I hereunto set my hand in the presence of two witnesses.

RAY W. HARROUN.

in the presence of- GEO. T. MAY, Jr., MARY F. ALLEN. 

